Greetings. I have the dreaded small gap in the hard plastic around the sunroof that is now the source of a water leak. I am researching different products to fill the gap before I just move on to a whole new glass unit. Any testimonials out there for a silicone or adhesive that you have used with success? 3M weatherstrip adhesive looks like a contender, but it was designed for metal, not glass. Thoughts?